zdtm: Add test for semi-closed unix connection

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -38,6 +38,7 @@ streaming/pipe_shared00
 transition/file_read
 static/sockets00
 static/sockets01
+static/sockets02
 static/sock_opts00
 static/sock_opts01
 static/sockets_spair

test/zdtm/live/static/Makefile

@@ -47,6 +47,7 @@ TST_NOFILE	=				\
 		utsname				\
 		pstree				\
 		sockets01			\
+		sockets02			\
 		sockets_spair			\
 		socket_queues			\
 		socket_queues02			\

test/zdtm/live/static/sockets02.c

+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test semi-closed unix stream connection\n";
+const char *test_author	= "Pavel Emelyanov <xemul@parallels.com>\n";
+
+int main(int argc, char *argv[])
+{
+	int ssk_pair[2], ret;
+	char aux;
+
+	test_init(argc, argv);
+
+	if (socketpair(AF_UNIX, SOCK_STREAM, 0, ssk_pair) == -1) {
+		fail("socketpair\n");
+		exit(1);
+	}
+
+	close(ssk_pair[1]);
+
+	test_daemon();
+	test_waitsig();
+
+	errno = 0;
+	ret = read(ssk_pair[0], &aux, sizeof(aux));
+	if (ret != 0 || errno != 0) {
+		fail("Opened end in wrong state (%d/%d)", ret, errno);
+		return 0;
+	}
+
+	errno = 0;
+	ret = read(ssk_pair[1], &aux, sizeof(aux));
+	if (ret != -1 || errno != EBADF) {
+		fail("Closed end in wrong state (%d/%d)", ret, errno);
+		return 0;
+	}
+
+	pass();
+	return 0;
+}